Linting base extension

[hallvictoria]

Applying black & isort linting changes to the base extension.

[codecov]

Codecov Report

Attention: Patch coverage is 96.95122% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 97.42%. Comparing base (c03582f) to head (c552c57).

Files	Patch %	Lines
...tension-base/azure/functions/extension/base/web.py	91.30%	2 Missing ⚠️
azure-functions-extension-base/tests/__init__.py	0.00%	1 Missing and 1 partial ⚠️
azure-functions-extension-base/tests/test_web.py	95.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #17      +/-   ##
==========================================
+ Coverage   94.80%   97.42%   +2.61%     
==========================================
  Files           7       13       +6     
  Lines         154      815     +661     
  Branches       10      111     +101     
==========================================
+ Hits          146      794     +648     
- Misses          7       16       +9     
- Partials        1        5       +4     

Flag	Coverage Δ
unittests	97.42% <96.95%> (+2.61%)	⬆️

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